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新手必学!Python数据预处理的4个重要步骤

  • 2026-02-05 00:40:26
新手必学!Python数据预处理的4个重要步骤
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  1. CONNECT:[ UseTime:0.000522s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000867s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000359s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000525s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000477s ]
  6. SELECT * FROM `set` [ RunTime:0.003789s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000694s ]
  8. SELECT * FROM `article` WHERE `id` = 472415 LIMIT 1 [ RunTime:0.006168s ]
  9. UPDATE `article` SET `lasttime` = 1770489399 WHERE `id` = 472415 [ RunTime:0.010490s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000307s ]
  11. SELECT * FROM `article` WHERE `id` < 472415 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001730s ]
  12. SELECT * FROM `article` WHERE `id` > 472415 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000456s ]
  13. SELECT * FROM `article` WHERE `id` < 472415 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002224s ]
  14. SELECT * FROM `article` WHERE `id` < 472415 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000830s ]
  15. SELECT * FROM `article` WHERE `id` < 472415 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003688s ]
0.098790s